(Doosan forklifts – error codes / diagnostic trouble codes)
Fault Action Descriptions
Fault List Definitions
Diagnostic Fault Codes (Flash Codes)
Doosan MI-07 systems are equipped with built-in fault diagnostics. Detected system faults can be displayed by the Malfunction Indicator Lamp (MIL) as Diagnostic Fault Codes (DFC) or flash codes, and viewed in detail with the use of the Service Tool software. When the ignition key is turned on, the MIL will illuminate and remain on until the engine is started. Once the engine is started, the MIL lamp will go out unless one or more fault conditions are present. If a detected fault condition exists, the fault or faults will be stored in the memory of the small engine control module (SECM). Once an active fault occurs the MIL will illuminate and remain ON. This signals the operator that a fault has been detected by the SECM.
Reading Diagnostic Fault Codes
All MI-07 fault codes are three-digit codes. When the fault codes are retrieved (displayed) the MIL will flash for each digit with a short pause (0.5 seconds) between digits and a long pause (1.2 seconds) between fault codes. A code 12 is displayed at the end of the code list.
EXAMPLE : A code 461 (ETCSticking) has been detected and the engine has shut down and the MIL has remained ON. When the codes are displayed the MIL will flash four times (4), pause, then flash six times (6), pause, then flash one time (1) This identifies a four sixty one (461), which is the ETCSticking fault. If any additional faults were stored, the SECM would again have a long pause, then display the next fault by flashing each digit. Since no other faults were stored there will be a long pause then one flash (1), pause, then two flashes (2). This identifies a twelve, signifying the end of the fault list. This list will then repeat.
Displaying Fault Codes (DFC) from SECM Memory
To enter code display mode you must turn OFF the ignition key. Now turn ON the key but do not start the engine. As soon as you turn the key to the ON position you must cycle the foot pedal by depressing it to the floor and then fully releasing the pedal (pedal maneuver). You must fully cycle the foot pedal three (3) times within five (5) seconds to enable the display codes feature of the SECM. Simply turn the key OFF to exit display mode. The code list will continue to repeat until the key is turned OFF.
Clearing Fault (DFC) Codes
To clear the stored fault codes from SECM memory you must complete the reset fault pedal maneuver.
CAUTION: Once the fault list is cleared it cannot be restored.
First turn OFF the ignition key. Now turn ON the key but do not start the engine. As soon as you turn the key to the ON position you must cycle the foot pedal by depressing it to the floor and then fully releasing the pedal (pedal maneuver). You must fully cycle the foot pedal ten (10) times within five (5) seconds to clear the fault code list of the SECM. Simply turn the key OFF to exit the reset mode. The code list is now clear and the SECM will begin storing new fault codes as they occur.
Fault Action Descriptions
Each fault detected by the SECM is stored in memory (FIFO) and has a specific action or result that takes place. Listed below are the descriptions of each fault action.
Engine Shutdown: The most severe action is an Engine Shutdown. The MIL will light and the engine will immediately shutdown, stopping spark, closing the fuel lock-off closing, and turning off the fuel pump and fuel injectors.
Delayed Engine Shutdown: Some faults, such as low oil pressure, will cause the MIL to illuminate for 30 seconds and then shut down the engine.
Cut Throttle: The throttle moves to its default position. The engine will run at idle but will not accelerate.
Cut Fuel: Fuel flow will be turned off.
Turn on MIL: The MIL will light by an active low signal provided by the SECM, indicating a fault condition. May illuminate with no other action or may be combined with other actions, depending on which fault is active.
Soft Rev Limit / Medium Rev Limit / Hard Rev Limit: System will follow various sequences to bring engine speed back to acceptable levels.
Level4 Power Limit / Level3 Power Limit / Level2 Power Limit / Level1 Power Limit: The maximum engine power output will be limited to one of four possible levels. The engine power is calculated from measured engine parameters (e.g. MAP, rpm, fuel flow, etc).
Disable Gas O2 Control: In LPG mode, closed loop correction of air fuel ratio based on the Pre-catalyst O2 sensor is disabled.
Disable Liquid O2 Control: In Gasoline mode, closed loop correction of air fuel ratio based on the Pre-catalyst O2 sensor is disabled.
Fault List Definitions
All the analog sensors in the MI-07 system have input sensor range faults. These are the coolant temperature sensor, fuel temperature sensor, throttle position sensors, pedal position sensors, manifold pressure sensor, HEGO sensors, and intake air temperature sensor. Signals to these sensors are converted into digital counts by the SECM. A low/high range sensor fault is normally set when the converted digital counts reach the minimum of 0 or the maximum of 1024 (1024 = 5.0 Vdc with ~ 204 counts per volt).
Additionally, the SECM includes software to learn the actual range of the pedal position and throttle position sensors in order to take full advantage of the sensor range. Faults are set if the learned values are outside of the normal expected range of the sensor (e.g. APP1AdaptLoMin).
APP1AdaptHiMax – MI-07 : 641 (MI-04 : 64)
Learned full pedal end of APP1 sensor range higher than expected
APP1AdaptHiMin – MI-07 : 651
Learned full pedal end of APP1 sensor range lower than expected
APP1AdaptLoMax – MI-07 : 661
APP1AdaptLoMin – MI-07 : 631 (MI-04 : 63)
Learned idle end of APP1 sensor range higher than expected
APP1RangeHigh – MI-07 : 621 (MI-04 : 62)
Learned idle end of APP1 sensor range lower than expected
APP1RangeLow – MI-07 : 611 (MI-04 : 61)
APP1 sensor voltage out of range high, normally set if the APP1 signal has shorted to power or the ground for the sensor has opened
APP2AdaptHiMax – MI-07 : 642 (MI-04 : 68)
APP1 sensor voltage out of range low, normally set if the APP1 signal has shorted to ground, circuit has opened or sensor has failed
APP2AdaptHiMin – MI-07 : 652
Learned full pedal end of APP2 sensor range lower than expected
APP2AdaptLoMax – MI-07 : 662
Learned idle end of APP2 sensor range higher than expected
APP2AdaptLoMin – MI-07 : 632 (MI-04 : 67)
Learned idle end of APP2 sensor range lower than expected
APP2RangeHigh – MI-07 : 622 (MI-04 : 66)
APP2 sensor voltage out of range high, normally set if the APP2 signal has shorted to power or the ground for the sensor has opened
APP2RangeLow – MI-07 : 612 (MI-04 : 65)
APP2 sensor voltage out of range low, normally set if the APP2 signal has shorted to ground, circuit has opened or sensor has failed
APP_Sensors_Conflict – MI-07 : 691 (MI-04 : 69)
APP position sensors do no not track well, intermittent connections to APP or defective pedal assembly
CamEdgesFault – MI-07 : 191
No CAM signal when engine is known to be rotating, broken CAM sensor leads or defective CAM sensor
CamSyncFault – MI-07 : 192
Loss of synchronization on the CAM sensor, normally due to noise on the signal or an intermittent connection on the CAM sensor
CrankEdgesFault – MI-07 : 193
No crankshaft signal when engine is known to be rotating, broken crankshaft sensor leads or defective crank sensor
CrankSyncFault – MI-07 : 194
Loss of synchronization on the crankshaft sensor, normally due to noise on the signal or an intermittent connection on the crankshaft sensor
ECTOverTempFault – MI-07 : 161 (MI-04 : 16)
Engine Coolant Temperature is High. The sensor has measured an excessive coolant temperature typically due to the engine overheating.
ECTRangeHigh – MI-07 : 151 (MI-04 : 15)
Engine Coolant Temperature Sensor Input is High. Normally set if coolant sensor wire has been disconnected or circuit has opened to the SECM.
ECTRangeLow – MI-07 : 141 (MI-04 : 14)
Engine Coolant Temperature Sensor Input is Low. Normally set if the coolant sensor wire has shorted to chassis ground or the sensor has failed.
ECT_IR_Fault – MI-07 : 171
Engine Coolant Temperature not changing as expected
EST1_Open – MI-07 : 421 (MI-04 : 42)
EST1 output open, possibly open EST1 signal or defective spark module
EST1_Short – MI-07 : 431
EST1 output shorted high or low, EST1 signal shorted to ground or power or defective spark module
EST2_Open – MI-07 : 422
EST2 output open, possibly open EST2 signal or defective spark module
EST2_Short – MI-07 : 432
EST2 output shorted high or low, EST2 signal shorted to ground or power or defective spark module
EST3_Open – MI-07 : 423
EST3 output open, possibly open EST3 signal or defective spark module
EST3_Short – MI-07 : 433
EST3 output shorted high or low, EST3 signal shorted to ground or power or defective spark module
EST4_Open – MI-07 : 424
EST4 output open, possibly open EST4 signal or defective spark module
EST4_Short – MI-07 : 434
EST4 output shorted high or low, EST4 signal shorted to ground or power or defective spark module
EST5_Open – MI-07 : 425
EST5 output open, possibly open EST5 signal or defective spark module
EST5_Short – MI-07 : 435
EST5 output shorted high or low, EST5 signal shorted to ground or power or defective spark module
EST6_Open – MI-07 : 426
EST6 output open, possibly open EST6 signal or defective spark module
EST6_Short – MI-07 : 436
EST6 output shorted high or low, EST6 signal shorted to ground or power or defective spark module
EST7_Open – MI-07 : 427
EST7 output open, possibly open EST7 signal or defective spark module
EST7_Short – MI-07 : 437
EST7 output shorted high or low, EST7 signal shorted to ground or power or defective spark module
EST8_Open – MI-07 : 428
EST8 output open, possibly open EST8 signal or defective spark module
EST8_Short – MI-07 : 438
EST8 output shorted high or low, EST8 signal shorted to ground or power or defective spark module
ETCSpringTest – MI-07 : 481 (MI-04 : 28)
Electronic Throttle Control Spring Return Test has Failed. The SECM will perform a safety test of the throttle return spring following engine shutdown. If this spring has become weak the throttle will fail the test and set the fault. NOTE: Throttle assembly is not a serviceable item and can only be repaired by replacing the DV-EV throttle assembly.
ETC_Open_Fault – MI-07 : 471
Electronic Throttle Control Driver has failed. Normally set if either of the ETC driver signals have opened or become disconnected, electronic throttle or SECM is defective.
ETC_Sticking – MI-07 : 461 (MI-04 : 26)
Electronic Throttle Control is Sticking. This can occur if the throttle plate (butterfly valve) inside the throttle bore is sticking. The plate sticking can be due to some type of obstruction; a loose throttle plate or worn components shaft bearings. NOTE: Throttle assembly is not a serviceable item and can only be repaired by replacing the DV-EV throttle assembly.
FuelSelectConflict – MI-07 : 181
Conflict in fuel select signals, normally set if one or both of the fuel select signals are shorted to ground
FuelTempRangeHigh – MI-07 : 932
Fuel Temperature Sensor Input is High. Normally set if the fuel temperature sensor wire has been disconnected or the circuit has opened to the SECM.
FuelTempRangeLow – MI-07 : 931
Fuel Temperature Sensor Input is Low. Normally set if the fuel temperature sensor wire has shorted to chassis ground or the sensor has failed.
GasFuelAdaptRangeHi – MI-07 : 731 (MI-04 : 73)
In LPG mode, system had to adapt lean more than expected
GasFuelAdaptRangeLo – MI-07 : 721 (MI-04 : 72)
In LPG mode, system had to adapt rich more than expected
GasO2FailedLean – MI-07 : 751
Pre-catalyst O2 sensor indicates extended lean operation on LPG
GasO2FailedRich – MI-07 : 771 (MI-04 : 77)
Pre-catalyst O2 sensor indicates extended rich operation on LPG
GasO2NotActive – MI-07 : 741 (MI-04 : 74)
Pre-catalyst O2 sensor inactive on LPG, open O2 sensor signal or heater leads, defective O2 sensor, or defective FTVs
GasPostO2FailedRich – MI-07 : 772
Post-catalyst O2 sensor control on LPG has reached rich limit and sensor still reads to lean. This could be caused by oxygen leak before or just after sensor, catalyst failure, sensor failure, or wiring/relay failure causing the sensor to not be properly heated. If any Pre-O2 sensor faults are set, diagnose these first and after correcting these faults recheck if this fault sets.
GasPostO2FailedLean – MI-07 : 752
Post-catalyst O2 sensor control on LPG has reached lean limit and sensor still reads to rich. This could be caused by catalyst failure, sensor failure, or wiring/relay failure causing the sensor to not be properly heated. If any Pre-O2 sensor faults are set diagnose, these first and after correcting these faults recheck if this fault sets.
GasPostO2Inactive – MI-07 : 742
Post-catalyst O2 sensor control on LPG has sensed the O2 sensor is not responding as expected. If any Pre-O2 sensor faults are set diagnose these first and after correcting these faults recheck if this fault sets. Possible causes for this fault are sensor disconnected, sensor heater failed, sensor element failed, heater relay, or SECM control of heater relay is disconnected or failed.
HbridgeFault_ETC – MI-07 : 491 (MI-04 : 29)
(Electronic Throttle Control Driver has Failed) Indeterminate fault on Hbridge driver for Electronic Throttle Control. Possibly either ETC+ or ETC- driver signals have been shorted to ground
HardOverspeed – MI-07 : 571 (MI-04 : 57)
Engine speed has exceeded the third level (3 of 3) of overspeed protection
IATRangeHigh – MI-07 : 381 (MI-04 : 38)
Intake Air Temperature Sensor Input is High normally set if the IAT temperature sensor wire has been disconnected, the circuit has opened to the SECM, or a short to Vbatt has occurred.
IATRangeLow – MI-07 : 371 (MI-04 : 37)
Intake Air Temperature Sensor Input is Low normally set if the IAT temperature sensor wire has shorted to chassis ground or the sensor has failed.
IAT_IR_Fault – MI-07 : 131
Intake Air Temperature not changing as expected 391 Inj1Open Gasoline Injector 1 open circuit, broken injector 1 wire or defective injector
Inj2Open – MI-07 : 132
Gasoline Injector 2 open circuit, broken injector 2 wire or defective injector
Inj3Open – MI-07 : 133
Gasoline Injector 3 open circuit, broken injector 3 wire or defective injector
Inj4Open – MI-07 : 134
Gasoline Injector 4 open circuit, broken injector 4 wire or defective injector
Inj5Open – MI-07 : 135
Gasoline Injector 5 open circuit, broken injector 5 wire or defective injector
Inj6Open – MI-07 : 136
Gasoline Injector 6 open circuit, broken injector 6 wire or defective injector
Inj7Open – MI-07 : 137
Gasoline Injector 7 open circuit, broken injector 7 wire or defective injector
Inj8Open – MI-07 : 138
Gasoline Injector 8 open circuit, broken injector 8 wire or defective injector
LSDFault_CSValve – MI-07 : 713
Cold Start Valve Fault, signal has opened or shorted to ground or power or defective cold start valve
LSDFault_CheckEngine – MI-07 : 714
Check Engine Lamp Fault, signal has opened or shorted to ground or power or defective check engine lamp
LSDFault_CrankDisable – MI-07 : 715
Crank Disable Fault, signal has opened or shorted to ground or power or defective crank disable relay
LSDFault_Dither1 – MI-07 : 711 (MI-04 : 71)
Dither Valve 1 Fault, signal has opened or shorted to ground or power or defective dither 1 valve
LSDFault_Dither2 – MI-07 : 712
Dither Valve 2 Fault, signal has opened or shorted to ground or power or defective dither 2 valve
LSDFault_FuelPump – MI-07 : 716
Fuel Pump Fault, signal has opened or shorted to ground or power or defective fuel pump
LSDFault_LockOff – MI-07 : 717
Fuel lock off Valve Fault, signal has opened or shorted to ground or power or defective Fuel lock off valve
LSDFault_MIL – MI-07 : 718
Malfunction Indicator Lamp Fault, signal has opened or shorted to ground or power or defective MIL lamp
LiqFuelAdaptRangeHi – MI-07 : 821
In Gasoline mode, system had to adapt rich more than expected
LiqFuelAdaptRangeLow – MI-07 : 831
In Gasoline mode, system had to adapt lean more than expected
LiqO2FailedLean – MI-07 : 851
Pre-catalyst O2 sensor indicates extended lean operation on gasoline
LiqO2FailedRich – MI-07 : 871
Pre-catalyst O2 sensor indicates extended rich operation on gasoline
LiqO2NotActive – MI-07 : 841
Pre-catalyst O2 sensor inactive on gasoline, open O2 sensor signal or heater leads, defective O2 sensor
LiqPostO2FailedRich – MI-07 : 872
Post-catalyst O2 sensor control on gasoline has reached rich limit and sensor still reads to lean. This could be caused by oxygen leak before or just after sensor, catalyst failure, sensor failure, or wiring/relay failure causing the sensor to not be properly heated. If any Pre-O2 sensor faults are set, diagnose these first and after correcting these faults recheck if this fault sets.
LiqPostO2FailedLean – MI-07 : 852
Post catalyst O2 sensor control on gasoline has reached lean limit and sensor still reads to rich. This could be caused by catalyst failure, sensor failure, or wiring/relay failure causing the sensor to not be properly heated. If any Pre O2 sensor faults are set, diagnose these first and after correcting these faults recheck if this fault sets.
LiqPostO2Inactive – MI-07 : 842
Post-catalyst O2 sensor control on gasoline has sensed the O2 sensor is not responding as expected. If any Pre-O2 sensor faults are set, diagnose these first and after correcting these faults recheck if this fault sets. Possible causes for this fault are sensor disconnected, sensor heater failed, sensor element failed, heater relay, or SECM control of heater relay is disconnected or failed.
LowOilPressureFault – MI-07 : 521 (MI-04 : 52)
Low engine oil pressure
MAPRangeHigh – MI-07 : 342
Manifold Absolute Pressure Sensor Input is High, normally set if the TMAP pressure signal wire has become shorted to power, shorted to the IAT signal, the TMAP has failed or the SECM has failed.
MAPRangeLow – MI-07 : 332
Manifold Absolute Pressure Sensor Input is Low, normally set if the TMAP pressure signal wire has been disconnected or shorted to ground or the circuit has opened to the SECM
MAPTimeRangeHigh – MI-07 : 341 (MI-04 : 34)
Manifold Absolute Pressure Sensor Input is High, normally set if the TMAP pressure signal wire has become shorted to power, shorted to the IAT signal, the TMAP has failed or the SECM has failed
MAPTimeRangeLow – MI-07 : 331 (MI-04 : 33)
Manifold Absolute Pressure Sensor Input is Low, normally set if the TMAP pressure signal wire has been disconnected or shorted to ground or the circuit has opened to the SECM
MAP_IR_HI – MI-07 : 351
MAP sensor indicates higher pressure than expected
MAP_IR_LO – MI-07 : 352
MAP sensor indicates lower pressure than expected
MAP_STICKING – MI-07 : 353
MAP sensor not changing as expected
MediumOverspeed – MI-07 : 572
Engine speed has exceeded the second level (2 of 3) of overspeed protection
O2RangeHigh – MI-07 : 921
Pre -catalyst O2 sensor voltage out of range high, sensor signal shorted to power
O2RangeLow – MI-07 : 911
Pre-catalyst O2 sensor voltage out of range low, sensor signal shorted to ground
O2_PostCatRangeHigh – MI-07 : 922
Post-catalyst O2 sensor voltage out of range high, sensor signal shorted to voltage source (5V or battery)
O2_PostCatRangeLow – MI-07 : 912
Post -catalyst O2 sensor voltage out of range low, sensor signal shorted to ground
SensVoltRangeHigh – MI-07 : 561 (MI-04 : 56)
Sensor reference voltage XDRP too high
SensVoltRangeLow – MI-07 : 551 (MI-04 : 55)
Sensor reference voltage XDRP too low
ServiceFault1 – MI-07 : 991
Service Interval 1 has been reached
ServiceFault2 – MI-07 : 992
Service Interval 2 has been reached
ServiceFault3 – MI-07 : 993
Service Interval 3 has been reached
ServiceFault4 – MI-07 : 994
Service Interval 4 has been reached—time to replace HEGO sensors
ServiceFault5 – MI-07 : 995
Service Interval 5 has been reached—time to replace engine timing belt
SoftOverspeed – MI-07 : 573
Engine speed has exceeded first level (1 of 3) of overspeed protection
TPS1AdaptHiMin – MI-07 : 271
Learned WOT end of TPS1 sensor range lower than expected
SysVoltRangeHigh – MI-07 : 541 (MI-04 : 54)
System voltage too high
SysVoltRangeLow – MI-07 : 531 (MI-04 : 53)
System voltage too low
TPS1AdaptHiMax – MI-07 : 251 (MI-04 : 25)
Learned WOT end of TPS1 sensor range higher than expected
TPS1AdaptHiMin – MI-07 : 271
Learned WOT end of TPS1 sensor range lower than expected
TPS1AdaptLoMax – MI-07 : 281
Learned closed throttle end of TPS1 sensor range higher than expected
TPS1AdaptLoMin – MI-07 : 241 (MI-04 : 24)
Learned closed throttle end of TPS1 sensor range lower than expected
TPS1RangeHigh – MI-07 : 231 (MI-04 : 23)
TPS1 sensor voltage out of range high, normally set if the TPS1 signal has shorted to power or ground for the sensor has opened
TPS1RangeLow – MI-07 : 221 (MI-04 : 22)
TPS1 sensor voltage out of range low, normally set if TPS1 signal has shorted to ground, circuit has opened or sensor has failed
TPS2AdaptHiMax – MI-07 : 252
Learned WOT end of TPS2 sensor range higher than expected
TPS2AdaptHiMin – MI-07 : 272
Learned WOT end of TPS2 sensor range lower than expected
TPS2AdaptLoMax – MI-07 : 282
Learned closed throttle end of TPS2 sensor range higher than expected
TPS2AdaptLoMin – MI-07 : 242
Learned closed throttle end of TPS2 sensor range lower than expected
TPS2RangeHigh – MI-07 : 232
TPS2 sensor voltage out of range high, normally set if the TPS2 signal has shorted to power or ground for the sensor has opened
TPS2RangeLow – MI-07 : 222
TPS2 sensor voltage out of range low, normally set if TPS2 signal has shorted to ground, circuit has opened or sensor has failed
TPS_Sensors_Conflict – MI-07 : 291
TPS sensors differ by more than expected amount. NOTE: The TPS is not a serviceable item and can only be repaired by replacing the DV-EV throttle assembly
TransOilTemp – MI-07 : 933
Excessive transmission oil temperature
Diagnostic Fault Codes (Flash Codes)
12 – NONE – Signifies the end of one pass through the fault list
Fault action: NONE
Solution: None, used as end of the fault list identification
131 – Inj1Open – Gasoline Injector 1 open circuit, broken injector 1 wire or defective injector
Fault action: TurnOnMil
Solution: Check INJ1 wiring for an open circuit
SECM (Signal) A5 to Injector 1 Pin A
Switched 12V to Injector 1 Pin B
Check Injector 1 Resistance, 12 to 14 ohms (cold)
132 – Inj2Open – Gasoline Injector 2 open circuit, broken injector 2 wire or defective injector
Fault action: TurnOnMil
Solution: Check INJ2 wiring for an open circuit
SECM (Signal) A8 to Injector 2 Pin A
Switched 12V to Injector 2 Pin B
Check Injector 2 Resistance, 12 to14 ohms (cold)
133 – Inj3Open – Gasoline Injector 3 open circuit, broken injector 3 wire or defective injector
Fault action: TurnOnMil
Solution: Check INJ3 wiring for an open circuit
SECM (Signal) A4 to Injector 3 Pin A
Switched 12V to Injector 3 Pin B
Check Injector 3 Resistance, 12 to14 ohms (cold)
134 – Inj4Open – Gasoline Injector 4 open circuit, broken injector 4 wire or defective injector
Fault action: TurnOnMil
Solution: Check INJ4 wiring for an open circuit
SECM (Signal) A7 to Injector 4 Pin A
Switched 12V to Injector 4 Pin B
135 – Inj5Open – Gasoline Injector 5 open circuit, broken injector 5 wire or defective injector
Fault action: None
Solution: N/A
136 – Inj6Open – Gasoline Injector 6 open circuit, broken injector 6 wire or defective injector
Fault action: None
Solution: N/A
137 – Inj7Open – Gasoline Injector 7 open circuit, broken injector 7 wire or defective injector
Fault action: None
Solution: N/A
138 – Inj8Open – Gasoline Injector 8 open circuit, broken injector 8 wire or defective injector
Fault action: None
Solution: N/A
141 (14) ECTRangeLow – Coolant Sensor failure or shorted to GND
Fault action: TurnOnMil
Solution: Check ECT sensor connector and wiring for a short to GND
SECM (Signal) Pin B15 To ECT Pin 3
151 (15) ECTRangeHigh – Coolant sensor disconnected or open circuit
Fault action:
(1) TurnOnMil
(2) Delayed Engine Shutdown
(3) CheckEngineLight
Solution: Check if ECT sensor connector is disconnected or for an open ECT circuit.
SECM (Signal) Pin B15 to ECT Pin 3
SECM (Sensor GND) Pin B1 to ECT Pin 1
161 (16) ECTOverTempFault – Engine coolant temperature is high. The sensor has measured an excessive coolant temperature typically due to the engine overheating.
Fault action:
(1) TurnOnMil
(2) DelayedEngine Shutdown
(3) CheckEngineLight
Solution: Check coolant system for radiator blockage, proper coolant level and for leaks in the system.
Possible ECT short to GND, check ECT signal wiring
SECM (Signal) Pin B15 to ECT Pin 3
SECM (Sensor GND) Pin B1 to ECT Pin 1
SECM (System GND) Pin A16, B17
Check regulator for coolant leaks
171 ECT_IR_Fault – Engine coolant temperature not changing as expected
Fault action: None
Solution: Check for coolant system problems, e.g. defective or stuck thermostat
181 FuelSelectConflict – Conflict in fuel select signals, normally set if both of the fuel select signals are shorted to ground
Fault action: TurnOnMil
Solution: Check fuel select switch connection for a short to GND
SECM (SIGNAL) Pin A12
SECM (SIGNAL) Pin A15
SECM (Sensor GND) Pin B1
191 CamEdgesFault – No CAM signal when engine is known to be rotating, broken crankshaft sensor leads or defective CAM sensor
Fault action: None
Solution: Check CAM sensor connections SECM (SIGNAL) Pin B10 to CAM sensor Pin 2
SECM (Sensor GND) Pin B1 to CAM sensor Pin 3
Switched 12V to CAM sensor Pin 1
Check for defective CAM sensor
192 CamSyncFault – Loss of synchronization on the CAM sensor, normally due to noise on the signal or an intermittent connection on the CAM sensor
Fault action: None
Solution: Check CAM sensor connections
SECM (SIGNAL) Pin B10 to CAM sensor Pin 2
SECM (Sensor GND) Pin B1 to CAM sensor Pin 3
Switched 12V to CAM sensor Pin 1
Check for defective CAM sensor
193 CrankEdgesFault – No crankshaft signal when engine is known to be rotating, broken crankshaft sensor leads or defective crank sensor
Fault action: None
Solution: Check Crankshaft sensor connections
SECM (SIGNAL) Pin B5 to Crank sensor Pin 3
SECM (Sensor GND) PIN B1 to Crank sensor Pin 2
Switched 12V to Crank sensor Pin 1
Check for defective Crank sensor
194 CrankSyncFault – Loss of synchronization on the crankshaft sensor, normally due to noise on the signal or an intermittent connection on the crankshaft sensor
Fault action: None
Solution: Check Crankshaft sensor connections
SECM (SIGNAL) Pin B5 to Crank sensor Pin 3
SECM (Sensor GND) Pin B1 to Crank sensor Pin 2
Switched 12V to Crank sensor Pin 1
Check for defective Crank sensor